// nandgame ALU

`timescale 1us/1us

`include "nandgame_types.v"
`include "arith_unit.sv"
`include "logic_unit.sv"

module  alu #(
  parameter DATA_WIDTH = 16
) (
  input [(DATA_WIDTH-1):0] X,
  input [(DATA_WIDTH-1):0] Y,
  input logic u,
  input logic [1:0] opcode,
  input logic zx,
  input logic sw,

  output logic [(DATA_WIDTH-1):0] RES
);

logic [(DATA_WIDTH-1):0] MyX;

logic [(DATA_WIDTH-1):0] MyY;
logic [(DATA_WIDTH-1):0] MyResA;
logic [(DATA_WIDTH-1):0] MyResL;

assign MyX = zx ? 0 : sw ? Y : X;
assign MyY = sw ? X : Y;

arith_unit au (
  .X(MyX),
  .Y(MyY),
  .RES(MyResA),
  .operation(opcode)
);

logic_unit lu (
  .X(MyX),
  .Y(MyY),
  .RES(MyResL),
  .operation(opcode)
);

assign RES = u ? MyResA : MyResL;


endmodule